Buchkapitel
Bauer, H.-G.; Franch, M.: Apendix 1 (b): Native species recorded or mentioned in EBBA1 but not recorded in EBBA2. In: European Breeding Bird Atlas 2: Distribution, Abundance and Change, S. 883 - 884 (Hg. Keller, V.; Herrando, S.; Voříšek, P.; Franch, M.; Kipson, M. et al.). European Bird Census Council & Lynx Edicions, Barcelona (2020)